JP3307864B2 - Foam squirt pump container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foam ejection pump container for ejecting uniform foam into a dispenser after a foaming liquid such as a detergent, a hand soap or a shampoo is mixed with air.

[0002]

2. Description of the Related Art Conventionally, there have been known some foam ejection pump containers which do not use high-pressure gas. For example, Japanese Utility Model Publication No. 58-23415 and Japanese Utility Model Publication No. 57-20285.
What is described in the gazette is known. These foam ejection pump containers include a double cylinder having a liquid cylinder and an air cylinder near the opening of the container containing the foaming liquid, and a liquid suction extending from the bottom of the liquid cylinder to the bottom of the container. A pipe, a piston body that integrates a liquid piston and an air piston that move up and down by sliding in the liquid cylinder and the air cylinder, respectively, and a bubble ejection hole provided at the upper end of the piston body A nozzle body having an opening, an air flow passage communicating the hole with the air piston, a liquid flow passage communicating the liquid piston with the hole, and a first reverse passage provided in the middle of the liquid flow passage. A stop valve, a second check valve disposed in the liquid cylinder, an urging spring for urging the piston body toward the top dead center with respect to the double cylinder, and fixing the double cylinder to the container. At the junction of the lid and the air flow path and the liquid flow path in the hole A porous body disposed to become a configuration of a ventilation inclusion such as sponge which has a function of discharging the gas in the introduction and discharge and foam.

[0003]

However, the above-described foam ejection pump container has a function of introducing outside air into the cylinder and a function of generating and discharging foam.
There is a problem that the fluid resistance at the time of introducing the outside air becomes large and the vertical movement of the piston body becomes difficult to smooth, and there is a problem of clogging due to drying and solidification of the liquid component of the foam remaining in the porous body.

[0004] Further, among the foam ejection pump containers, the type in which the air cylinder is provided above the liquid cylinder has a problem that the height of the entire container is increased because the length of the entire double cylinder is long. There is a point.

On the other hand, in the type in which the bottoms of the liquid cylinder and the air cylinder are at substantially the same position, the sliding portion of the liquid piston and the sliding portion of the air piston are at substantially the same height. Therefore, when the piston body is pushed down, the piston body is unstable and tends to tilt, making it difficult to push down, and the amount of air sent to the permeable inclusion changes, so that the mixing ratio with the liquid cannot be kept constant. .

Further, since the upper end of the liquid cylinder is located below the upper end of the air cylinder and has a considerably smaller diameter than the air cylinder, the piston is inserted into the double cylinder and the pump is driven. When assembling, there is a problem that it is difficult to insert the liquid piston into the liquid cylinder, and it takes skill or time to assemble.

Therefore, the foam ejection pump of the present invention has been made in view of the above problems, and there is no problem of clogging because the liquid component of the foam remaining in the porous body does not dry and solidify. Since the length of the entire double cylinder of the type in which the air cylinder is provided above the cylinder can be shortened, the height of the entire container is reduced, and the air to be sent out because the piston body is stable at the time of pushing down operation The volume does not change, the mixing ratio with the liquid can be kept constant, and the work of inserting the piston for liquid into the cylinder for liquid is easy when inserting the piston body into the double cylinder and assembling the pump. Accordingly, an object of the present invention is to provide a foam ejection pump container which does not require skill or a long time for assembly.

[0008]

Means for Solving the Problems The above-mentioned problems are solved,
In order to achieve the object, according to the present invention, an air cylinder for an air pump and a liquid cylinder for a liquid pump provided inside an opening of a container containing a foaming liquid are made of resin. A double cylinder concentrically and integrally formed; a liquid suction pipe communicating the bottom of the liquid cylinder with the bottom of the container; and a vertical cylinder in the air cylinder and a liquid cylinder. A piston body in which a moving air piston and a liquid piston are provided concentrically and integrally, a nozzle body having a bubble ejection hole provided at an upper end of the piston body, the hole and the air An air flow path that communicates with the inside of the liquid cylinder, a liquid flow path that communicates with the inside of the liquid cylinder and the hole, a first check valve disposed in the middle of the liquid flow path, The second cylinder is located at the lower end of the cylinder. A check valve, a porous sheet that is disposed in the hole, provided on an upstream side as viewed from the distribution設箇plant porous body, the liquid passage and the air having passed through the air passage A mixing chamber for mixing the liquid that has passed therethrough, an urging spring for urging the piston body toward the top dead center with respect to the double cylinder, and communication between the liquid in the container and the outside air outside the container. Outside air introduction means for preventing the inside of the container from becoming negative pressure, a lid body for fixing the double cylinder to the container and guiding the piston body through, a cylinder for air, and a cylinder for air. A third check valve for introducing outside air into an air chamber formed by the piston through a gap between an outer peripheral surface of the air piston and a portion through which the lid is inserted; a sliding portion and the sliding portion of the liquid piston of the piston, the latter on the former A bubble jet pump container in which the liquid cylinder is extended below the air cylinder so as to move up and down with a height difference so that the air cylinder has at least a bottom portion thereof. The central part has a reversing part that is reversed upward ,
The liquid cylinder is the reversing part of the air cylinder.
A connecting part that extends downward after connecting to the upper end of
And the inner surface of the connecting portion is inclined inward and downward so that the diameter gradually decreases from upward to downward.

The connecting portion may be inclined inward and downward so that the diameter of the connecting portion becomes gradually smaller from the top to the bottom so that the thickness of the connecting portion is substantially the same. It is characterized by.

Further, it is more preferable that the upper end position of the sliding portion of the liquid piston at the upper limit position of the piston body is located higher than the inner surface position of the lower end of the air cylinder.

[0011]

With the above arrangement, the liquid cylinder is formed below the air cylinder, and the sliding portion of the air piston that slides up and down while contacting the air cylinder inner surface and the liquid cylinder inner surface. The sliding portion of the liquid piston that slides up and down while contacting is vertically separated from each other. As a result, when the piston body is pushed down, the piston body is supported at two places at the top and bottom. In addition, the piston body is unlikely to tilt or wobble when the piston body is pushed down. Therefore, there is no variation in the amount of air sent from the air chamber due to poor contact between the sliding portion of the air piston and the inner surface of the air cylinder.

Although the liquid cylinder is below the air cylinder, at least the central portion of the bottom of the air cylinder is inverted upward, and the liquid cylinder is provided at the upper end of the inverted portion. Connecting the parts and extending downwardly therefrom.

That is, since the entire length of the double cylinder of the present invention is considerably shorter than the sum of the length of the air cylinder and the length of the liquid cylinder, the liquid cylinder is disposed below the air cylinder. It is not necessary to make the height dimension of the container for storing the foaming liquid much larger than the conventional bubble jet pump container having the same.

Further, since the inner surface of the upper end portion of the liquid cylinder is inclined inward and downward so that the diameter gradually decreases as going from above to below, the piston body is inserted into the double cylinder and the pump is inserted. When assembling, the liquid piston is easily inserted into the liquid cylinder.

Further, a thin sheet- like porous body is used as the porous body, and outside air introducing means for communicating between the inside of the container and the outside of the container is provided, and an air chamber formed by an air cylinder and an air piston is provided. Since a third check valve is provided in the air piston for introducing outside air into the air through the gap between the outer peripheral surface of the air piston and the insertion portion of the lid, the fluid resistance at the time of introducing outside air is small, and Up-and-down movement can be performed smoothly and speedily, and clogging due to the liquid component of the foam being dried and solidified in the porous body hardly occurs.

The inverted portion of the bottom portion of the air cylinder such that the upper end position of the sliding portion of the liquid piston at the upper limit position (top dead center) of the piston body is higher than the inner surface position of the lower end of the air cylinder. If the length of the double cylinder is increased, the overall height of the double cylinder can be made shorter.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a foam ejection pump container according to the present invention will be described below with reference to the drawings by dividing the first embodiment into upper and lower halves.

First, FIG. 1 is a longitudinal sectional view showing an upper portion of a first embodiment of a foam ejection pump container, and FIG. 2 is a longitudinal sectional view showing a lower portion of the foam ejection pump container.

First, in FIG. 1, using a resin material, for example, in a cylindrical container 1 which is blow-molded,
A foamable liquid A to which a surfactant or the like is mixed and imparted with a property of foaming when mixed with air is stored up to a liquid level W having a maximum liquid level. At the outer peripheral edge of the upper opening of the container 1, an opening screw portion 1a of a male screw portion is integrally formed, and an inner screw portion 15a which is a female screw portion of the large lid body 15 is formed with respect to the opening screw portion 1a. By maintaining the screwed state, the airtight state of the container is maintained, and the pump assembly described below can be fixed to the container 1 in a completed state.

Next, the structure of the pump assembly will be described. The cylinder part of the pump is integrally formed from a resin such as a polypropylene resin and formed as a double cylinder 3 having two large and small air cylinder parts 3c and a liquid cylinder part 3d concentrically as shown in the figure. Have been. The double cylinder 3 is opened upward, the fitting ring portion 3a having a locking portion which is locked after being press-fitted into the small lid body 14 at the opening edge portion, The flange portions 3b to be fixed portions are each formed in an annular shape. Therefore, in order to make the assembled state shown in the figure, after assembling each component described later in the double cylinder 3, the above-mentioned large lid 15 is previously attached to the double cylinder 3
Into the flange 3b, and press-fits and locks the fitting ring 3a between the outer wall locking portion 14c and the inner wall portion 14b of the small lid 14 injection-molded from the last colored polypropylene resin or the like. It is sufficient that the large lid 15 does not fall off the pump assembly.

Next, as shown in the figure, the double cylinder 3 has an outer diameter slightly smaller than the inner diameter of the opening screw portion 1a of the container 1 following the fitting ring portion 3a and the flange portion 3b, and A cylinder part 3c for air having a cylindrical shape, and a cylinder part 3 for air at the center of the bottom 3e of the cylinder part 3c for air.
c as a whole and a substantially air cylinder portion 3c
And a liquid cylinder portion 3d having a smaller diameter than the air cylinder portion 3c.

More specifically, the air cylinder 3
c is a guide cylinder 3c1 having an inner diameter smaller than that of the fitting ring 3a.
And a cylindrical portion 3c2 connected to the guide cylindrical portion 3c1 by a tapered portion and having an inner diameter smaller than that of the guide cylindrical portion 3c1, and a diametrically inward extending from a lower end of the cylinder portion 3c2 and a central portion extending upward. Inverted portion 3e1 of a substantially frustoconical shape (or a shape having an inclined surface whose diameter gradually decreases as the outer peripheral surface goes upward from below)
And the bottom 3e. On the other hand, the liquid cylinder portion 3d is an upper end of the inverted portion 3e1 of the bottom portion 3e of the air cylinder portion 3c, and has a short inverted truncated conical shape (or an outer peripheral surface having an upwardly directed outer surface) on which a seal projection 3f described later is formed. (A shape having an inclined surface such that the diameter becomes gradually smaller from the lower side to the lower side) The portion 3d1 is connected at the upper end thereof, extends downward from the substantially inverted truncated conical connecting portion 3d1, and has a smaller diameter near the lower end. . In the present embodiment, FIG.
As shown in FIG. 3, the bottom inverted portion 3e1 of the air cylinder portion 3c2 and the upper connection portion 3 of the liquid cylinder portion 3d.
Since not only the outer peripheral surface but also the inner peripheral surface of d1 has a substantially frustoconical shape or a substantially inverted frustoconical shape, the thickness of d1 is almost the same as the other portions.

The dimensional relationship between the inner diameters of the fitting ring 3a, the guide cylinder 3c1 and the cylinder 3c2 and the outer diameter of the sliding seal 10j of the air piston 10 described later is as follows. 3a is larger than the outer diameter of the sliding seal portion 10j, and the inner diameter of the guide cylinder portion 3c1 is
0j, and the inner diameter of the cylinder portion 3c2 is slightly smaller than the outer diameter of the sliding seal portion 10j. Further, the inner surface portions having different inner diameters are connected by a tapered portion. With the above configuration, when the pistons for air 10 and the pistons 12 for liquid are assembled in advance, and each piston is inserted into each cylinder, the sliding seal portion 10j of the piston 10 for air is fitted to the fitting ring portion 3a. By simply lowering the flange portion 3b, the guide cylinder portion 3c1, and the cylinder portion 3c2 in this order, the centering of the liquid cylinder portion 3d and the liquid piston 12 can be inevitably performed, thereby facilitating the insertion operation. Moreover, there is no danger of damaging the sliding parts of the pistons during this operation.

The mixing ratio between the liquid and the gas is substantially determined by the volume ratio between the air cylinder 3c and the liquid cylinder 3d. However, in order to generate bubbles, the amount of air is larger than the amount of liquid. It needs to be large enough. On the other hand, if the overall length of the double cylinder 3 is too large, the height of the container 1 must be increased accordingly, so that the center of the bottom 3e of the air cylinder 3c is It is configured to be inverted upward and to connect the upper end portion thereof to the liquid cylinder portion 3d.

According to the above-described embodiment, as is apparent from FIGS. 1 and 2, the upper inverted portion 3e1 of the bottom portion 3e of the air cylinder portion 3c is considerably long, so that it is in contact with the inner surface of the liquid cylinder portion 3d. When the liquid piston 12 is at the top dead center position, the upper end of the sliding seal portion 13c of the liquid piston 12, which will be described later, which is a part that moves up and down, is higher than the lower end inner surface position of the air cylinder portion 3c. It is in a considerably higher position.
Therefore, the length of the double cylinder portion 3 is considerably shorter than the sum of the length of the air cylinder portion 3c and the length of the liquid cylinder portion 3d, and the sum of the lengths of both cylinder portions is equal to the length of the double cylinder portion. There is an advantage in that the height of the container for storing the liquid can be considerably reduced as compared with the conventional type of bubble jet pump container in which the lower end portion of the air cylinder portion is immediately connected to the liquid cylinder portion.

Further, while the liquid cylinder 3d is suspended from the upper end of the bottom 3e of the air cylinder 3c,
Since the sliding seal portion 10j of the air piston 10 and the sliding seal portion 13c of the liquid piston 12 have a difference in height, the slidable piston is supported at least at two upper and lower positions. , Which is effective in preventing the inclination and unevenness of the piston.

On the other hand, on the back side of the connecting portion of the liquid cylinder portion 3d to the air cylinder portion 3c, an annular seal projection 3f is formed so as to protrude upward in the air cylinder portion 3c. During storage or the like, a pneumatic piston, which will be described later, is fitted to the seal projection 3f so that a sealed state can be maintained. Further, the inner surface inward from the seal protrusion 3f is formed in a mortar shape as shown
Is formed continuously so as to move to the inner peripheral surface of the liquid cylinder portion 3d in a portion in contact with the sliding seal portion 13c, and a sliding seal body 13 described later is easily pulled into the liquid cylinder portion 3d. Consideration has been given to insert and assemble without hanging.

On the other hand, as outside air introducing means for preventing the inside of the container 1 from becoming a negative pressure, outside air is introduced into the guide cylinder portion 3c1 of the air cylinder portion 3c by the internal screw portion 14a of the small lid member 14.
3g of outside air introduction hole for introducing into the container 1 through the
(See the right side of FIG. 1). The outside air corresponding to the volume in which the foamable liquid A has been consumed is introduced into the outside air introduction hole 3.
By introducing into the container 1 via g, the inside of the container 1 is prevented from becoming negative pressure. An annular seal body 2 made of a soft resin that maintains a sealed state is interposed between the flange 3b of the double cylinder 3 and the open end 1b of the container 1. The seal body 2 includes an annular portion 2c fitted on the upper outer peripheral surface of the guide cylinder portion 3c1 of the air cylinder portion 3c,
The sealing portion 2 is formed by closing the screw of the large lid 15 to the container 1.
a serves as a packing to secure a sealed state, and a thin tongue portion 2b serving as a valve plugging the outside air introduction hole 3g is provided on a part of the seal member 2 with an air cylinder 3b.
The tongue 2b is elastically deformed and opened only when the above-described outside air is introduced. At other times, the tongue 2b always closes the outside air introduction hole 3g, and when the container is transported or stored. Liquid A from the outside air introduction hole 3g.
Is prevented from leaking into the air cylinder 3c.

Referring to FIG. 2, the container 1 has a bottom portion 1c formed partly deep to improve the seating of the container and enhance the strength, while consuming the foamable liquid A, as is well known. As shown in the drawing, even if W is lowered, liquid can be absorbed through the hollow liquid absorbing tube 4 to the end. On the other hand, the liquid cylinder 3d of the double cylinder 3 is formed to extend downward, and ends with the lower hole 3i having a reduced diameter. The upper end 4a of the liquid suction tube 4 is press-fitted into the lower hole 3i.
A ball pedestal 3j is formed inside the stepped portion between the lower hole 3i and the liquid cylinder 3d, and a second ball 8 made of stainless steel or the like and having excellent corrosion resistance is movable to the positions shown by solid lines and broken lines. Is set to In the liquid cylinder 3d, a plug 5 is further provided so as to cover the ball pedestal 3j as shown in FIG.
While restricting the position of the ball 8 to the position shown by the broken line,
An annular pedestal portion 5c serving as a receiving portion of a coil spring 6 for providing a repulsive force against a pressing force of an injection nozzle body described later is provided. A stopper 5a is formed on the head of the stopper 5, and the stopper 5a is fitted into the liquid guide hole 13b of the sliding seal body 13 forming a piston, so that the stopper 5a can be transported or stored. To prevent the liquid A from leaking. An opening 5b is formed between the plug portion 5a and the pedestal portion 5c. When the second ball 8 moves to the position shown by the broken line, the liquid A flows through the opening 5b into the liquid cylinder portion 3d. To be introduced.

Referring again to FIG. 1, the portion corresponding to the piston of the pump assembly is integrally slid vertically in the air cylinder portion 3c and the liquid cylinder portion 3d of the double cylinder 3 described above. Configuration. For this,
The air piston 10 is a set of upper and lower parts that can secure sufficient airtightness when sliding vertically on the inner wall surface of the air cylinder portion 3c (specifically, the inner wall surface of the cylinder portion 3c2). Sliding seal portion 10j and air chamber portion 10i
And a hollow rod portion 10a is further integrally formed upward from a central portion of the air chamber portion 10i. Also, as is clear from the figure,
Since the sliding seal portion 10j of the air piston 10 contacts the inner wall surface of the air cylinder portion 3c at two upper and lower locations, a sealed state can be ensured even if the user presses the air piston 10 obliquely. As a result, the mixing ratio of air and liquid can always be kept constant.

On the other hand, the liquid piston 12 is press-fitted into the air piston 10 and is integrally fixed so as to be integrally movable. The liquid piston 12 is formed of a cylindrical body as shown in the drawing to guide the liquid into the inside, has a ball pedestal 12b for holding the first ball 7 on the upper part, and has an opening 12c communicating with the liquid guiding part 12a. Provided.

The first ball 7 is a small coil spring 2
Although it is always located at the position shown by the solid line due to the action of 0,
The liquid A introduced into the liquid guide portion 12a during a use operation described below.
As a result, the first ball 7 is pushed by the pressure, the small coil spring 20 is compressed, the first ball 7 moves to the position shown by the broken line, and the opening 12c and the mixing chamber 11 communicate with each other. 11 is sent. Here, the first ball 7 can be positioned on the ball pedestal 12b by its own weight only. However, the provision of the small coil spring 20 prevents liquid leakage when the container 1 falls down. Further, the first ball 7 can be integrally formed with the small coil spring 20 as shown in the external view of the integrally formed product of the first ball and the coil spring in FIG.

On the other hand, at the lower end of the liquid piston 12, a press-fitting portion 13a of a sliding body 13 having a sliding seal portion 13c which slides in the liquid cylinder 3d while keeping the airtight state in the vertical direction is shown. It is pressed in like. This sliding body 13
Is provided with a liquid guide hole 13b which is fitted into the plug 5a of the plug 5 to maintain an airtight state and serves as a flow path for introducing a liquid. Further, the sliding seal portion 1
The upper end of the above-described coil spring 6 is in contact with the lower side of 3c, so that the integrated body of the air piston 10 and the liquid piston 12 can be urged to move to the position shown in the figure.

Next, the rod portion 10 of the air piston 10
The ejection nozzle body 17 is press-fitted into the end portion 10e of FIG. For this purpose, a press-fit hole 17f having a concave portion is formed in the ejection nozzle body 17 so that the convex portion of the rod portion 10a can be fitted and fixed. A mixing chamber 11 for mixing liquid and air to generate bubbles is provided at the upper end of the rod portion 10a.
Is also formed. An opening 10c is provided at the upper center portion of the mixing chamber 11 for ejecting bubbles generated by mixing air and liquid into a net, which will be described later. A small hole is formed around the opening 10c. A rib 10d for disposing the coil spring 20 at the center is formed radially. Below the rib 10d, a plurality of air passages 10f for guiding the air in the air chamber 10i of the air piston 10 are formed radially. A seal portion 10h that fits into the seal protrusion 3f of the double cylinder body 3 is formed in the vicinity of the lower open portion of the air passage portion 10f, so that the seal portion 10h can be fitted and sealed.

Next, on the upper wall of the air piston 10, a check valve for introducing outside air, which acts when introducing outside air, is integrally provided. This check valve has a check valve portion 10 in which a third ball 9 is movably incorporated at positions shown by solid lines and broken lines.
k, and is open at the top of the check valve portion 10k.
Opening 10L closed when ball 9 moves upward
And the third ball 9 is held at the position shown by the solid line in FIG.
And a stopper 10m that allows the outside air to be introduced through 0L.

On the other hand, the rod portion 10 of the air piston 10
a is guided with a gap between its outer peripheral surface and the inner peripheral surface of the opening 14d of the small lid 14, and outside air is introduced into the check valve composed of the third ball 9 through this gap. I do it.

Next, a mesh 18 of about 200 mesh / inch and made of polyester fiber and having a thickness of 0.06 mm is provided in The ejection nozzle body 17 is press-fitted after two sheets are vertically interposed. The diameter of the foam is determined by the count of the mesh body 18 and the bubbles having a random diameter in the mixing chamber 10b are turned into fine uniform bubbles by passing the mesh body 18 through the mesh body 18, and the ejection nozzle body 17 is formed.
Can be ejected to the outside through the hole 17b and the nozzle hole 17a. This net 18 may be one sheet. In addition, as the net 18, a nylon, polyethylene, polypropylene, carbon fiber or stainless steel wire may be used, and a net having a thickness of 20 to 400 mesh / inch and a thickness of 0.01 to 2 millimeters may be used. Is good. Preferably, the thickness is 0.0 to 50 to 300 mesh / inch.
A mesh of 3 to 0.5 millimeters is good.

Further, in place of the net 18, 0.03 to 0.3.
The thickness, which has a large number of small holes of 5 mm, is 0.
Polyethylene is used for a sheet of 01 to 2 mm.
Injection molding of a thermoplastic resin such as polypropylene, or a sintered molded article having a similar small hole and thickness or an etched metal plate may be used.

On the other hand, the press-fit hole 17f of the ejection nozzle body 17
An outer thread 17d of a male thread is formed on the outside of the small lid 14 so that the outer thread 17d can be screwed into an inner thread 14a which is a female thread of the small lid 14. Care has been taken to ensure a sealed state during long-term storage or transport. For this purpose, the inner screw part 14a
The dimensional relationship between the inner diameter of the opening 14d formed below the outer portion 17e and the outer diameter of the outer portion 17e formed below the outer threaded portion 17d is slightly larger than the outer diameter of the outer portion 17e, When the above-mentioned outer screw part 17d is screwed into the inner screw part 14a which is a female screw part of the small lid 14, the outer peripheral part 17e is fitted into the opening part 14d, and the upper space of the air cylinder is formed. It is designed to be airtight.

Next, the operation of the above configuration will be sequentially described. FIG. 3 is a longitudinal sectional view showing a state where the above-described foam ejection pump container is in a state of long-term storage or transportation.

In this drawing, a liquid is contained in a container up to a liquid level W, and contact between the components is made such that the liquid does not leak when the liquid is not used, such as when the liquid is conveyed or displayed in a store. The parts are brought into pressure contact to ensure a sealed state. In order to make this state, the nozzle body 17 is pressed against the small lid body 14 against the urging force of the coil spring 6, and is rotated so that the outer screw portion 17d is screwed with the inner screw portion 14a.

As a result, the first seal portion S1 in a state where the stopper 5a of the stopper 5 is fitted in the liquid guide hole 13b of the slide 13 fixed to the liquid piston 12, and the seal of the double cylinder 3 The protrusion 3f is a seal portion 10h of the air piston 10.
, And a fourth seal portion S4 in which the outer peripheral portion 17e of the ejection nozzle body 17 fits in the opening 14d of the small lid member 14.

On the other hand, the large lid 15 is screwed into the container 1 via the seal 2 to form the second seal portion S2. The seal 2 has a thin tongue 2b integrally formed therewith. The tongue 2b forms a third seal portion S3 for closing the outside air introduction hole 3g. Since the hermetically sealed state is ensured by the above-described first to fifth seal portions, leakage of the content liquid does not occur when the container is transported or stored.

Next, with reference to FIGS. 1 and 2, a procedure for ejecting foam by the foam ejection pump container constructed as described above will be described. First, the long-term storage state shown in FIG.
When the ejection nozzle body 17 is pushed downward in a state in which the liquid A is not introduced into the liquid guide portion 12a of the liquid piston 12, the first ball 7 and the third ball 7 are raised due to an increase in the internal pressure of the air cylinder and the liquid cylinder. The balls 9 are respectively raised to the positions shown by the broken lines, and only the second balls 8 remain at the positions shown by the solid lines.

After that, when the ejection nozzle body 17 is released, the unit of the air piston 10 and the liquid piston 12 rises by the restoring force of the coil spring 6. At this time, the inside of the liquid cylinder 3d becomes a negative pressure and the first check valve formed of the first ball 7 is closed, and then the inside of the liquid cylinder 3d is further reduced to the second check valve formed of the second ball 8. The stop valve opens and the liquid A is sucked into the liquid cylinder. At the same time, the inside of the air chamber 10i also becomes a negative pressure, and the third check valve made of the ninth ball opens, so that the outside air passes through the gap between the rod 10a and the opening 14d of the small lid 14 and resists. Without being blown into the air chamber 10i to prepare for bubble ejection. When the piston body is lowered again, the outside air introduced into the air chamber 10i of the air cylinder is pressurized and closes the third check valve. As a result, the air that has lost its place in the air chamber 10i is pressurized, rises through the air passage 10f, and is sent into the mixing chamber 11. At the same time, the liquid A in the liquid cylinder 3d is also pressurized and rises through the liquid guide portion 12a to open the first check valve composed of the first ball 7 against the coil spring 20 to mix the liquid. It is sent to the room 11.

As a result, the liquid A and the air are mixed in the mixing chamber 11.
The foam is mixed and foamed to generate bubbles of random diameter. After that, these bubbles further pass through the mesh 18 to form uniform bubbles, and are ejected from the ejection nozzle 17 to the outside.

At this time, since the inside of the container is under negative pressure due to the decrease in the consumption of the liquid A, the tongue 2b is elastically deformed outward to open the outside air introduction hole 3g, and the outside air flows from the outside air introduction hole 3g into the container. It is sucked into the upper space inside to eliminate the negative pressure in the container. Thereafter, the tongue 2b closes the outside air introduction hole 3g. Thereafter, by further moving the piston body up and down, the gas-liquid mixture ratio is always constant and stable bubbles are ejected.

Next, FIG. 5 is a longitudinal sectional view showing a second embodiment of the foam ejection pump container, and the basic structure is substantially the same as that of the first embodiment, so different portions will be described. In this figure, the lid 140 is a jet nozzle 1
It has both functions of guiding holes for guiding 70 and screwing to the container 100. The coil spring 60 is not provided in the liquid cylinder 30d but in the air cylinder 3d.
0c. The air cylinder 30c
Is reduced in diameter, and the reduced inclined wall and the bottom 30 are reduced.
The lower end of the spring 60 is accommodated in a narrow space between the upper portion e and the inverted portion 30e1. Further, the above-described outside air introduction hole 30g is provided with the sliding seal portion 10 of the air piston.
j. And the liquid cylinder 30
At the bottom of d, a second ball 8 is housed after being housed,
Is provided. Also according to the second embodiment having the above-described configuration, by moving the piston body up and down, the gas-liquid mixture ratio is always constant, and stable bubbles can be ejected.

In the above description, bubbles having a random size were generated in the mixing chamber 11, but this was confirmed in an experiment in which the piston 18 was pushed down by removing the net 18 from the container 1. is there.

As described above, according to the foam ejection pump container of each embodiment of the present invention, the resistance at the time of introducing outside air can be reduced, the up-and-down motion of the piston body can be made smooth, and the foam remaining in the mesh can be obtained. Bubble ejection pump container that does not cause clogging of the porous body due to drying and solidification of the liquid component and that can always keep the amount of air introduced into the air cylinder constant and the mixing ratio with the liquid Can be provided.

In addition, the foam ejection pump container can be closed when the nozzle body is screwed into the lid when not in use.

Further, since air is taken into the air cylinder from outside the container, it is not necessary to secure a useless space in the upper part of the container, and the liquid can be stored near the outside air introduction hole in the upper part of the cylinder. it can.

As described above, since the foam is generated in the mixing chamber 11 and then made uniform by the mesh 18 as a sheet-like porous body, the foam is injected into the mesh 18 by any chance. Even if clogging occurs later due to unexpected factors, the clogged portion is melted by the liquid forming bubbles at the next injection, in addition to the fact that the sheet-like net 18 is thin. Will be resolved. Moreover, since the outside air is introduced through the gap, the vertical movement of the piston is not affected at all.

As described above, according to the foam ejection pump container of the present invention, at the time of pushing down the piston body for ejecting foam, the piston body comes into contact with the upper and lower portions of the inner surface of the air cylinder and the inner surface of the liquid cylinder. Because it will be supported as it is, the piston body will not tilt or wobble,
A smooth pressing operation can be performed, and the amount of air sent out from the air chamber can always be constant.

In the bubble jet pump container of the present invention, at least the center of the bottom of the air cylinder is inverted upward, and the upper end of the liquid cylinder is connected to the upper end of the inverted portion. The overall length of the double cylinder can be reduced as compared with a conventional bubble jet pump container having a liquid cylinder below an air cylinder. Therefore,
Compared with the above-mentioned conventional bubble jet pump container, the height of the container for storing the liquid can be reduced.

Further, in the bubble jet pump container of the present invention, the liquid piston is inclined inward and downward so that the inner surface of the upper end portion of the liquid cylinder gradually decreases in diameter from the upper side to the lower side. The operation of inserting the pump into the liquid cylinder is facilitated, and as a result, the pump can be easily assembled.

Further, in the bubble jet pump container of the present invention, since the outside air is introduced into the air chamber through the third check valve, the resistance at the time of introducing the outside air is small, and the vertical movement of the piston body can be made smooth. Since the sheet-like porous body is used, there is almost no occurrence of clogging of the porous body due to drying and solidification of the liquid component of the foam remaining in the porous body. Since the body is thin, the clogged portion is dissolved by the liquid forming the foam at the next foam injection, and the clogging is immediately eliminated, so there is no problem.Moreover, as described above, the amount of air sent into the mixing chamber is reduced. Since the mixing ratio can always be kept constant, the mixing ratio with the liquid can be kept constant. As described above, the embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and even if there is a design change within the scope of the present invention, it is included in the present invention. It is.

[0058]

As described above, according to the present invention, there is no problem of clogging due to drying and solidification of the liquid component of the foam remaining in the porous body, and the air cylinder is located above the liquid cylinder. The overall length of the double cylinder can be reduced as compared to the conventional double cylinder of a bubble jet pump container having a lower height, and the height of the entire container can be reduced. And the amount of air sent out to the mixing chamber does not change, the mixing ratio with the liquid can be kept constant, and when the piston is inserted into the double cylinder to assemble the pump, the liquid piston Since it is easy to insert the liquid into the liquid cylinder, it is possible to provide a foam ejection pump container which does not require skill or a long time for assembly.

[0059]

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an upper portion of a first embodiment of a foam ejection pump container.

FIG. 2 is a longitudinal sectional view showing a lower portion of the first embodiment of the foam ejection pump container.

FIG. 3 is a longitudinal sectional view showing a state where the foam ejection pump container is in a long-term storage or transport state.

FIG. 4 is an external view of an integrally molded product of a first ball and a coil spring.

FIG. 5 is a longitudinal sectional view showing a second embodiment of the foam ejection pump container.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container 2 Seal body 3 Double cylinder 4 Liquid suction pipe 5 Plug body 6 Coil spring 7 1st ball (for 1st check valve) 8 2nd ball (for 2nd check valve) 9 3rd ball (3rd (For check valve) 10 Air piston 11 Mixing chamber 12 Liquid piston

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B05B 11/00 101 B65D 47/06 B65D 47/34 F04B 9/14

Claims (3)

(57) [Claims] An air cylinder for an air pump and a liquid cylinder for a liquid pump provided inside an opening of a container containing a foaming liquid are formed concentrically and integrally with resin. A double cylinder provided, a liquid suction pipe communicating the bottom of the liquid cylinder with the bottom of the container, an air piston and a liquid piston for vertically moving in the air cylinder and the liquid cylinder, respectively. A piston body integrally provided with a piston concentrically, a nozzle body provided at the upper end of the piston body and having a hole for blowing bubbles, and air for communicating the hole with the inside of the air cylinder A flow path, a liquid flow path for communicating the inside of the liquid cylinder with the hole, a first check valve disposed in the middle of the liquid flow path, and a lower end of the liquid cylinder And a second check valve provided in the hole A sheet-like porous body to be provided, and a mixing chamber which is provided on the upstream side as viewed from the location where the porous body is disposed, and in which the air flowing through the air flow path and the liquid flowing through the liquid flow path are mixed. A biasing spring that biases the piston body toward the top dead center with respect to the double cylinder communicates with the liquid in the container and the outside air outside the container to prevent the inside of the container from becoming a negative pressure. Outside air introducing means, a lid body for fixing the double cylinder to the container and guiding the piston body through, and an outside air into an air chamber formed by the air cylinder and the air piston. A third check valve for performing the introduction through the gap between the outer peripheral surface of the air piston and the insertion portion of the lid, wherein the sliding portion of the air piston of the piston and the sliding of the liquid piston are provided. and dynamic part, providing the height difference so the latter becomes lower on the former The so as to move up and down, the liquid cylinder a foam jetting pump vessel is extended below the air cylinder, the air cylinder, reversing part at least a central portion of the bottom is inverted upwardly And the liquid cylinder is the reversing part of the air cylinder.
A connecting part that extends downward after connecting to the upper end of
Wherein the inner surface of the connecting portion is inclined inward and downward so that the diameter gradually decreases from upward to downward. 2. The connecting portion according to claim 1, wherein the connecting portion is inclined inward and downward so that the diameter gradually decreases as going from upper to lower, so that the connecting portion has substantially the same thickness. Item 7. A foam ejection pump container according to Item 1. 3. The liquid piston according to claim 1, wherein an upper end position of the sliding portion of the liquid piston at an upper limit position of the piston body is higher than an inner surface position of a lower end of the air cylinder. 3. The foam ejection pump container according to any one of 2.